org.lsst.ccs.monitor

Class DerivedChannel

java.lang.Object

org.lsst.ccs.monitor.Channel

org.lsst.ccs.monitor.DerivedChannel

All Implemented Interfaces:

HasLifecycle

public abstract class DerivedChannel
extends Channel

A class to be extended by derived channels, i.e. Channels that derived their value from other channels.

Author:

The LSST CCS Team

Field Summary

Fields inherited from class org.lsst.ccs.monitor.Channel

alarmHi, alarmHiA, alarmLo, alarmLoA, checkHi, checkLo, dbandHi, dbandLo, description, devcName, doNotTrend, format, hwChan, limitHi, limitLo, offset, pageId, resetHi, resetLo, scale, subtype, type, TYPE_DIFF, TYPE_POWER, TYPE_PROD, TYPE_QUOT, TYPE_SUM, TYPE_SWITCH, TYPE_TEMP, TYPE_UNKNOWN, TYPE_VOLTS, typeI, units

Constructor Summary

Constructors

Constructor and Description
DerivedChannel()

Method Summary

Modifier and Type	Method and Description
void	build() First lifecycle hook.
abstract double	evaluateDerivedValue() Callback function to evaluate the derived value.

Methods inherited from class org.lsst.ccs.monitor.Channel

convertRawValue, enableAlarm, getAlarmNameHi, getAlarmNameLo, getDbandHi, getDbandLo, getDescription, getDevice, getFormat, getGroup, getLimitHi, getLimitLo, getName, getPageId, getPath, getType, getTypeStr, getUnits, getValue, init, readValue, setDbandHi, setDbandLo, setFormat, setLimitHi, setLimitLo, setValid

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.lsst.ccs.framework.HasLifecycle

postBuild, postInit, postShutdown, postStart, shutdown, start

Constructor Detail

DerivedChannel

public DerivedChannel()

Method Detail

build

public void build()

Description copied from interface: HasLifecycle

First lifecycle hook. Modification of the component tree is allowed at this stage. After this stage the tree of component cannot be modified anymore. This is where agent periodic tasks should be scheduled.

evaluateDerivedValue

public abstract double evaluateDerivedValue()

Callback function to evaluate the derived value.

Returns:

the derived value.